SA

Estimating Sums and Differences





There is not one correct estimation answer. There are 2 or more. One type of estimating is front end.

Front-End Estimation
When you use front-end estimation you add or subtract the front of a decimal.

Using Estimation to Solve Problems
To estimate differences and sums of decimals,you can use the same methods for whole numbers.

Here are some websites to help you.

AAAMath
Estimating Sums and Differences
Fun Brain